ORCHIDACEAE SCHOMBURGKIANAE THE ORCHIDS COLLECTED BY R. H. SCHOMBURGK IN SOUTH AMERICA AND THE CARIBBEAN1

ABSTRACT The Orchidaceae collected by Robert H. Schomburgk in northern South America and the Caribbean are listed in alphabetical order according to their names in current use. Each entry includes bibliography, synonymy, and type information for each name cited. Lectotypes are proposed for the following names: Epidendrum schomburgkii var. confluens, Pseudoeriopsis schomburgkii, Galeandra juncea, Zygopetalum burkei, and Sobralia sessilis. The Orchidaceae in Robert H. Schomburgk's “Drawings of Guiana Plants” at the Botany Library, The Natural History Museum are presented in an appendix.